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KS... z series substations Transformer substations in concrete enclosures operated from the outside

1000 kVA

800 kVA

630 kVA

ABB


Table of contents 1. 2. 3.

Subject of the paper ...................................................................................................................... 4 Application of the substation........................................................................................................ 4 Technical specifications ............................................................................................................... 4 3.1. Substation building .................................................................................................................. 5 3.1.1. KS 19-28 z substation building specifications: ............................................................... 6 3.1.2. KS 22-30 z substation building specifications: ............................................................... 6 3.1.3. KS 25-36 z substation building specifications: ............................................................... 7 3.1.4. Building supplementary data: ........................................................................................... 7 3.2. Equipment arrangement........................................................................................................... 8 3.3. Substation technical specifications .......................................................................................... 8 3.3.1. Standards: ......................................................................................................................... 9 3.4. Medium-voltage switchgears .................................................................................................. 9 3.5. Low-voltage switchboard ........................................................................................................ 9 3.6. Transformers.......................................................................................................................... 10 3.7. Medium-voltage and low-voltage cable connections ............................................................ 10 3.8. Substation earthing ................................................................................................................ 10 4. Substation assembly and foundation .......................................................................................... 11 4.1. Substation foundation trench and installation of the substation ............................................ 11 5. Environmental protection ........................................................................................................... 11 6. Warranty ..................................................................................................................................... 12 7. Documentation acceptance ......................................................................................................... 12 8. Ordering a substation.................................................................................................................. 12 9. Substation transportation and hand-over .................................................................................... 12 10. Single-transformer substations (fig. 08.1 and 08.2) ............................ 27-28 11. Substation with medium-voltage side measurement (fig. 09.1 and 09.2) .............................29-30 12. Two-transformer substations (fig. 10.1 and 10.2) ...............................31-32

List of figures Fig. 01. Fig. 02. Fig. 03. Fig. 04. Fig. 05. Fig. 06.

Exterior styles Equipment placement Equipment placement Transformer installation Cable bushings KS...z joinery

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1. Subject of the paper The subject of the paper is transformer substations operated from the outside, housed in reinforced concrete enclosures: • KS 19-28 z substation • KS 22-30 z substation • KS 25-36 z substation • KS 25-36 z substation (special version) • two-transformer substations

....................... with ....................... with ....................... with .......................... with

transformer of up to 630 kVA transformer of up to 630 kVA transformer of up to 1000 kVA transformer of up to 1250 kVA

The substation is made as a complete, self-contained power device. It comprises a transformer, mediumvoltage switchgear and low-voltage switchboard, a measurement circuit on the medium-voltage or low-voltage sides, cables and associated equipment; it’s a ready-to-use product to be placed directly in the desired location.

KS

substation designation

-

z

number of substation buildings type of KS in the set-up

KS

Compact transformer substation

substation building dimensions (dm) z – operated from the outside

2. Application of the substation The KS...z type transformer substations are designed for providing electrical power supply to public and industrial customers from medium-voltage networks of up 20 kV, and low-voltage networks of 400/230 V in TN-C systems.

3. Technical specifications The substation, depending on the building type, is designed for the following equipment: Building KS 19-28 z (→ page 13) medium-voltage switchgear: ..................... low-voltage RNTw type switchboard....... transformer ..............................................

4

with SF6 insulation - SafeRing or SafePlus • up to 4 bays 1250 A up to 630 kVA


Building KS 22-30 z (→ page 14) medium-voltage switchgear: ..................... low-voltage RNTw type switchboard...... transformer................................................

with SF6 insulation - SafeRing or SafePlus • up to 5 bays 1250 A up to 630 kVA

Building KS 25-36 z (→ page 15, 16) medium-voltage switchgear: .....................

with SF6 insulation - SafeRing or SafePlus • up to 5 bays low-voltage RNTw type switchboard........ 1250 A (1600 A) transformer.................................................. up to 1000 kVA

3.1. Substation building The KS...z substation buildings are made of concrete using permanent moulds (walls and base are made of B35 type concrete, roof is made of B45 type concrete – walls are 10 cm thick).

Die-cast concrete building (deformations and cracking of the building in the construction, transportation and operation processes are eliminated)

Substation concrete components: building, base and roof

The supporting constructions as well as fixing and transporting fittings are metallically joined with building reinforcement. All metal components of the building are hot-zinc-coated. Substation doors and ventilation grates are made of aluminium sheets and sections (or tinned steel), and painted with polyester powder paints (→ fig. 06). Ventilation doors are standard equipped with insect screens. The door frame of the transformer room is equipped with protection railing hooks (for the upper voltage – connector transformer type), and with hooks for safety nets (for the transformers with traditional ceramic insulators). The building roof is made of B45 type concrete (→ page 18), and is fitted with threaded transportation sockets (with PVC plugs – the plugs and lifting slings for roof removal are delivered with the substation as standard). Equipment can be installed inside the substation after removal of the roof. The transport fittings are approved for permissible loads. The building contain medium-voltage, low-voltage, and transformer compartments.

5


The medium-voltage switchgear and low-voltage switchboards are accessed after opening service doors, separate for the medium- and low-voltage sections. The transformer is accessed after opening the transformer room ventilation door. The medium-voltage and low-voltage cables are passed into the building base through type P50 (P70) (→ fig. 05) cable bushings or HD cable bushings. The KS 19-28 z contains 9 type P50 (p70) cable bushings as standard – for the dry medium-voltage cables, and the low-voltage cables are run directly from the ground. In the KS 22-30 z buildings and KS 25-36 z buildings, the medium-voltage cables, and the low-voltage cables are run through the P70 cable bushings. The substation building internal walls and roof are painted with white waterproof acrylic paints; the walls, base floor and substation building floor are multi-layer painted with sealing paints. The external walls structural plaster finish and the roof are painted with sealing paints according to the RAL colour palette. The base trim and the roof are painted – from the outside – with sealing paints in the substation door colour. The standard substation external finish is shown in fig. 01.

The buildings can be set-up in groups

(if e.g. two-transformer substations are required → page 17)

3.1.1. KS 19-28 z substation building specifications (→ page 13): width: substation building .......................................................................... 1900 mm substation roof ................................................................................ 2050 mm length: substation building.......................................................................... substation roof................................................................................ height above the ground............................................................................. base foundation depth................................................................................. total building height................................................................................... substation building weight (without equipment)............................................ equipped substation weight (without transformer) ....................................... substation weight with the transformer (up to 630 kVA) ............................. building area...............................................................................................

2800 mm 2950 mm 1740 mm 650 mm 2390 mm 6500 kg 7500 kg 9500 kg 5.35 m2

3.1.2. KS 22-30 z substation building specifications (→ page 14): external width at base at roof external length at base at roof

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............................................................................... 3000 mm .............................................................................. 3150 mm ................................................................................ 2200 mm ............................................................................... 2350 mm


height above the ground............................................................................ 1800 mm base foundation depth...................................................................................... 700 mm total height................................................................................................. 3320 mm substation building weight......................................................................... 8000 kg equipped substation weight (without transformer)............................................. 9500 kg substation weight with the transformer (up to 1000 kVA) ............................ 12300 kg building area................................................................................................ 6.6 m2 3.1.3. KS 25-36 z substation building specifications (→ pages 15,16): width: substation building........................................................................ substation roof..............................................................................

3600 mm 3750 mm

length: substation building........................................................................ substation roof.............................................................................. height above the ground........................................................................... base foundation depth (including surface) .................................................. total building height................................................................................. substation building weight....................................................................... equipped substation weight (without transformer)............................................ substation weight with the transformer (up to 1000 kVA) .......................... building area.............................................................................................

2500 mm 2650 mm 1800 mm 700 mm 3320 mm 10500 kg 12000 kg 14800 kg 9 m2

3.1.4 Building supplementary data: protection degree .............................................................................. enclosure impact strength........................................................................ roof load strength ............................................................................ enclosure class .............................................................................. fire resistance........................................................................................... fire resistance of walls and ceilings........................................................ substation fire load (depending on the amount of oil in the transformer housing and size of the substation building) e.g.: 19-28 z substation with 630 kVA transformer.......................................... 22-30 z substation with 630 kVA transformer.......................................... 25-36 z substation with 630 kVA transformer.......................................... the minimum distance from other objects (depending on the type

IP 43 20 J 2500 N/m2 10 B 120 min 3660 MJ/ m2 2890 MJ/ m2 2165 MJ/ m2 10 to 15 m *)

of the neighbouring buildings) * distances can be reduced: by 50% if the neighbouring building wall has a 60 min fire resistance, and there is only one door of at least 30 min fire resistance; by further 25% if the neighbouring building is equipped with fixed, automatic fire extinguishing system.

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The transformer substation can be located adjacent to a building, with a solid wall (no openings) towards the building, if the distance to the window and door openings is more than 1.1 m, and the horizontal and vertical distances from rooms with permanent presence of people is higher than 2.8 m.

3.2. Equipment arrangement The devices installed inside the building are operated from the outside. The medium-voltage switchgears and low-voltage switchboards are located in the medium-voltage and low-voltage compartments on two opposite sides of the building, divided by the transformer room. The switchgears and switchboards are accessed after opening service doors, and the transformer room is accessed through the ventilation door (→ figs 02 and 03). The concrete moulding production process allows for individual location of doors, division walls (or their removal), and special equipment holes.

3.3. Substation technical specifications The KS...z series transformer substations are type-tested at the Electrical Power Institute in Warsaw. • transformer substation type: • transformer substation type: • transformer substation type:

KS 19-28 z KS 22-30 z KS 25-36 z

(up to 630 kVA) (up to 630 kVA) (up to 630 kVA)

• transformer substation type:

KS 25-36 z

(1000 kVA)

certificate no.550 certificate no.569 certificate no.569 attestation no. 021/2002 certificate no.596

Scope of substation testing: • • • • • •

general requirements regarding construction and functionality, mechanical strength of the building against impacts and loads, protection degree, heat increase inside the station building, electric strength of insulation, fault current load, main circuit and earthing connections inspection and evaluation of internal arc fault effects.

General substation data: substation rated power ....................................................... 630 kVA (1000 kVA) rated frequency ....................................................... 50 Hz number of phases ...................................................................... 3 Medium-voltage side data: rated voltage

8

..................................................................

17.5kV or 24 kV


insulation rated level ....................................................... 125 kV / 50 kV busbar rated continuous current ................................ 630 A (400 A) line bay .......................................................... 630 A (400 A) transformer bay .......................................................... 200 A peak withstanded rated current: busbar ................................................................... 31.5 kA line bay and earthing switch ........................................... 31.5 kA short-term withstanded rated current: busbar ................................................................... 12.5 kA line bay and earthing switch ........................................... 12.5 kA rated fault duration ..................................................................... 1 sec. Low-voltage side data: rated voltage ............................................................................... insulation rated level ................................................................... busbar rated continuous current ............................................ main switch disconnector (circuit breaker) .................................. feeder bay ................................................................................ peak withstanded rated current ............................................ short-term withstanded rated current ................................ rated fault duration ...................................................................

400 V 660 V 990 A (1440 A) 1250 A (1600 A) 400 A (630 A) 40 kA 16 kA 0.5 sec

Transformer data: transformer type

..................................................................

transformer power ................................................................... upper-voltage connection ..........................................................

sealed, oil cooled (or dry, resin type) up to 630 kVA (1000 kVA)

connector-type (or insulators with terminal lug)

3.3.1. Standards: EN 61330 : Prefabricated transformer high-voltage/low-voltage stations EN 60298 : 2000 – AC switchgears in metal enclosures for voltages above 1 kV. IEC 439-1+AC : 1994 – Low-voltage switchgear and controlgear. Requirements for fully and partially tested sets. IEC 1641 : 1996 – Technical Report. Enclosed low-voltage switchgear and controlgear assemblies. Guide for testing under conditions of arcing due to internal fault. IEC 529 (1989) – Protection provided by enclosures (IP code).

3.4.

Medium-voltage switchgears (→ page 19, and the ‘SafeRing and SafePlus’ catalogue)

3.5.

Low-voltage switchboard

(→ pages 20-22)

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3.6.

Transformers

(→ page 23, and the: ‘Distribution transformers’ catalogue)

The transformer inside the substation building is standing on shock absorbing cushions, and fixed to the hooks provided in the building’s transformer room. (→ fig. 04). The transformer is connected with the medium-voltage switchgear using three single-phase cables 1 x 50 (70) mm2, in cross-linked polyethylene insulation for up to 20 kV voltage (one per phase). The cables from the medium-voltage switchgear side are terminated with elbow jack heads e.g. type EASW 20/250 (type and kind of head on the medium-voltage switchgear side is defined in the switchgear assembly and operation documentation).

3.7. Medium-voltage and low-voltage cable connections (→ page 24) The cables for transformers with connectors are terminated on the upper-voltage side with alternatively: elbow jack heads e.g. type EASW 20/250 or straight jack heads e.g. EASG 20/250. For the transformers with insulators, the cables on upper-voltage side are terminated with indoor heads e.g. type TI 24. The low-voltage cables of the RNTw switchboard are terminated with traditional KU 240 type cable terminals, and connected on the transformer side using e.g. PFISTERER type terminals or KU 240 type cable terminals. The transformer lower-voltage side terminals can be insulated with insulating covers.

3.8. Substation earthing (→ page 25) The electric shock protection of the transformer substation is made with safety earthing. The low-voltage service earthings as well as the medium-voltage and low-voltage safety earthings are all connected to common earth. Safety earthing: The substation equipment and structures are connected to the earthing busbar with the 1 x 50 mm2 cable in (yellow and green insulation). The earthing busbar is connected through the measurement contact (1 → page 25) with external substation earthing (flat section 200mm2). The building reinforcement is used as a common, metallic connection of all the substation structure components. RNTw switchboard service earthing: The PEN terminal of the RNTw switchgear is connected through the measurement contact (3) with the substation external earthing. Transformer service earthing: The transformer neutral point is connected through the measurement contact (2) with the substation external earthing. The measurement contact (2) is connected to the transformer neutral point using the LgY 1 x 50 mm2 cable – blue insulation (1 x 120 mm2 or zinc-coated flat-section 25 x 4 mm2 – acc. to the directives of Power Distribution Administration). To facilitate substation earthing installation, flat-section FeZn 50 x 4 segments are provided to connect the earthing points no. 1, 2, and 3 with the circumferential earthing.

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4. Substation assembly and foundation (→ page 26) The substation has been designed to be transportable to the construction site using traditional transportation means (weights of buildings are given in the substation building specifications → page 6). A special lifting sling or a traverse is delivered with the substation for the setting up purposes (we can guarantee assistance in proper substation installation).

The substation installation site must guarantee a driveway and a manoeuvre field for a crane and truck carrying the substation. health and safety regulations must be observed at all times • the substations must be set up by cranes with lifting capacity of more than 50% higher than the substation weight • use only the lifting slings and traverses designed for the KS... substations

4.1. Substation foundation trench and installation of the substation The substation should be placed in a foundation trench filled with water draining sub-crust breakstone or gravel of 0 ÷ 16 ÷ 25 mm granularity. In case of embankment grounds (unstable) a 15 cm thick concrete foundation slab should be made (B15 concrete with ∅12 mm wire reinforcement in 15 x 15 cm mesh), dimensions as given on page 26. Because of cable runs, the oversizing of the concrete foundation slab should be avoided (an oversized concrete slab can limit cable runs to the bushings).

The depth of the substation foundation trench can be obtained as the total depth of the trench plus surface thickness, as given in the infrastructure design. KS 19-28 z ................................... total of 650 mm KS 22-30 z ................................... total of 700 mm KS 25-36 z ................................... total of 700 mm After setting up the substation, the transportation holes should be secured with PVC plugs (supplied with the substation).

5. Environmental protection The KS...z substations do not create any ecological threat. Buildings, doors, and all associated structures are made of environmentally friendly materials. The building base contains a leak-proof oil pit that prevents the transformer oil permeation into soil, and ground waters through the building base. We guarantee assistance in scrapping of accidentally damaged equipment. (e.g.. switchgears with SF6 gas).

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6. Warranty The manufacturer gives a limited warranty for transformer substations, equipped as ordered, for a period of minimum 24 months – excluding other vendors’ equipment, which is covered by a 12-month warranty. The manufacturer accepts no liability for damages and faults resulting from incorrect operation and usage, lack of maintenance or improperly performed engineering works. We guarantee assistance in choosing and commissioning of the substation, training of personnel, delivery of spares and consumables.

7. Documentation acceptance The KS... series transformer substations are accompanied by type documentation During the preparation of the transformer substation documentation, apart from the legal and formal steps related to substation architecture and location, the following should be done: • substation electrical diagram co-ordination and design, based on technical conditions issued by the relevant Power Distribution Company • co-ordination with the Power Distribution Administration the way and type of electric power measurements, and design of the measuring circuit (if applicable) • design of the external distribution networks • design of the substation earthing, using natural earthings, based on soil resistivity measurements • planning of the substation assembly procedure, with regard to transportation conditions

8. • • • • • • • • •

Ordering a substation When ordering a substation, the following should be defined: type of substation (building) operating voltage of the medium-voltage side type and number of bays in the medium-voltage switchgear configuration of the RNTw low-voltage switchboard additional equipment of the RNTw low-voltage switchboard transformer type, rated power, and voltages of the lower and upper-voltage sides types of cables supplying power in the medium-voltage line bays transformer cable connections (connectors and insulators) substation exterior colour and contents of the warning labels (→ page 18)

9. Substation transportation and hand-over We deliver the substation with our own transportation means, and provide lifting slings and traverses to unload and set-up the substation. Location preparation and the crane to unload the substation are provided by the client. We guarantee assistance in setting-up of the station

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KS 19-28 z substation building General specifications

KS 19-28 z

building width building length building height above ground depth of building foundation Protection degree building weight less equipment

630 kVA

1900 mm 2800 mm 1700 mm 650 mm IP 43 ~6500 kg

supplementary building dimensions

fig.s 02 and 03

Materials building roof joinery

reinforced concrete (B35) reinforced concrete (B45) aluminium (or aluzinc)

the building walls are finished with structural plasters in the ordered colour (standard – sand RAL 1015)

operated from the outside

the building roof is covered with sealing paints (standard – brown RAL 8016 or ash RAL 7032) joinery is painted with powder paints in the roof colour

equipment installation after roof removal

1900

4

ventilation door

5

exhaust grate

6 7

sealed cable bushings temporary cable inlet

8

medium-voltage compartment

9

low-voltage compartment

2 8

3

7

4

2800

service door 1700

building roof

3

10

5 650

substation building

2

2350

1

6 1

9

10 transformer room

• building wall thickness is 100 mm

13


KS 22-30 z substation building General specifications

KS 22-30 z

630 kVA

building width building length building height above ground depth of building foundation protection degree building weight less equipment

3000 mm 2200 mm 1800 mm 700mm IP 43 8000 kg

Materials building roof joinery

reinforced concrete (B35) reinforced concrete (B45) aluminium (or aluzinc)

the building walls are finished with structural plasters in the ordered colour (standard – sand RAL 1015) the building walls are finished with structural plasters in the ordered colour (standard – sand RAL 1015) the building roof is covered with sealing paints (standard – brown RAL 8016 or ash RAL 7032) joinery is painted with powder paints in the roof colour

operated from the inside equipment installation after roof removal

2200

4

ventilation door

5

exhaust grate

6

sealed cable bushings

7

medium-voltage compartment

8

low-voltage compartment

9

transformer room

7

3

9

4

1350

service door

3000

3

2

1800

building roof

5 700

substation building

2

2550

1

6 1 800

8 375

• building wall thickness is 100 mm

14


KS 25-36 z substation building General specifications

KS 25-36 z

1000 kVA

3600 mm 2500 mm 1800 mm 700 mm IP 43 10500 kg

building width building length building height above ground depth of building foundation protection degree building weight less equipment Materials building

reinforced concrete (B35)

roof

reinforced concrete (B45)

joinery

aluminium (or aluzinc)

the building walls are finished with structural plasters in the ordered colour (standard – sand RAL 1015)

the building roof is covered with sealing paints (standard – brown RAL 8016 or ash RAL 7032) joinery is painted with powder paints in the roof colour

operated from the inside equipment installation after roof removal

2500

substation building

6

cable bushings

7

medium-voltage compartment

8

low-voltage compartment

9

transformer room

3

4

2000

exhaust grate

3600

ventilation door

5

9 1800

service door

4

5 700

building roof

3

2550

2

7 2

6 1

8

1

800

375

• building wall thickness is 100 mm

15


KS 25-36 z substation building

KS 25-36 z

lants ower p p l il m d for win

1250 kVA

General specifications building width building length building height above ground depth of building foundation protection degree building weight less equipment

3600 mm 2500 mm 1800 mm 700 mm IP 43 11000 kg

Materials building joinery

reinforced concrete aluminium (or aluzinc)

the building walls are finished with structural plasters in the ordered colour (standard – sand RAL 1015) the building roof is covered with sealing paints (standard – brown RAL 8016 or ash RAL 7032) joinery is painted with powder paints in the roof colour

operated from the inside equipment installation after roof removal

2500

2

7

3

4 2000

3600

2550

1800

8

1

substation building

2

building roof

3

service door

4

ventilation door

5

exhaust grate

700

5 6 1

800

6

cable bushings

7

medium-voltage and low-voltage compartment

8

transformer room

16

• building wall thickness is 100 mm


Set of two KS substation buildings operated from the outside

2 KS 22-30 z 2 KS 25-36 z

500

breakstone

2 KS 19-28 z

The set of two buildings allow to create a two-transformer substations. Construction of such substation with typical buildings significantly facilitates the substation set-up and allows free choice of architecture. Division of substation weights e.g. two-transformer substations, allows use of traditional transportation means (especially in difficult locations).

17


Building roofs KS...z

building roofs :

KS 19-28 z KS 22-30 z KS 25-36 z

and

2 x KS 19-28 z 2 x KS 22-30 z 2 x KS 25-36 z

1

2 Flat, double slope, reinforced concrete, 5% pitch

Flat, single slope, reinforced concrete, 2.5% pitch

Outside operated substation roofs:

1 2

• single or double slope reinforced concrete slab, covered with sealing paints on outside in the joinery colour • the roof is fitted with threaded transportation sockets (plugged with PVC plugs – the plugs and lifting slings for roof removal are supplied with the substation)

made for the substations standing adjacent to buildings or for 2 KS... z substations.

standard KS... z substation roof

Drainpipes and decorative roofs are provided for the KS... z type substations

External designations of the KS... z substations

company logo substation type substation number

warning label with inscriptions: 1. DO NOT TOUCH 2. ELECTRICAL DEVICE 3. DANGER

ground level

MV/LV TRANSFORMER MV/LV TRANSFORMER

18

ventilation door 1 ventilation door 2

MV SWITCHGEAR LV SWITCHGEAR

MV switchgear service door LV switchboard service door


Medium – voltage switchgear in SF6 insulation B

A

C

As standard, the substation is designed for SF6 insulated switchgear, SafeRing or SafePlus type. :

The MV switchgear transformer bays are equipped with a circuit breaker or a fuse. In the switchgear equipped with the isolation switch (200 A), the transformer is protected by a combination of a high-power isolation switch, and highvoltage HRC fuse links type CEF. The isolation switch rated current in the transformer bay is limited by the fuse link rated current (see table below). Detailed information on switchgear design and operation is given in installation and operation documentation of the MV switchgears. Note: the UniSwitch, SafePlus and traditional, air insulated switchgears allow free choice of configuration of medium-voltage side bays

Phase order Each bay in the MV switchgear (SF ) is standard equipped with neon lamp voltage indicators, and with test sockets for setting phase of the medium-voltage cables (in each phase). Phasing devices are fitted on clients request. 6

MV switchgears in SF6 insulation type rated voltage

SafeRing

SafePlus

17.5 and 24 kV

17.5 and 24 kV

transformer bay: - with fuse - without fuse 2

number of bays

3

4

2

3

4

5

A

(mm)

696 1021 1346

696 1021 1346 1671

B

(mm)

750

750

C

(mm)

1345

1345

- application of different switchgear requires consultation

table of fuse MV links selection in MV switchgear transformer bays upper voltage

15 kV

transformer power

fuse

transformer power

fuse

100 kVA

10 A

100 kVA

10 A

160 kVA

16 A

160 kVA

16 A

250 kVA

25 A

250 kVA

16 A

400 kVA

25 A

400 kVA

25 A

630 kVA

40A

630 kVA

40 A

1000 kVA

63 A

1000 kVA

50 A

upper voltage

20 kV

Note: overcurrent CT settings (for the MV switchgear with circuit breaker) – acc. to directives given in the MV switchgear documentation.

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RNTz switchboards

allows hanging on the substation bearing structure incomer from above, feeder from below module design: 6, 10, 12 feeder bays gr. 2 (3) ready to add: - control/measurement system PK - measurement/counter system PR (current transformers)

Cu 60 x 10 (Cu 80 x 10)

Example Internal load Compensation 16 A D01

Cu 40 x 10 (Cu 60 x 10)

RNTz - for outside operated substations

RB-00

16 A D01

220 V/16 A

SOCOMEC Sirco 1250 A (1600 A)

RNT switchboard specifications:

PV

D01

V PK measurement

1250 A (1600 A)

rated feeder current

3

A

160 / 400 / 630 A

D01

standard colour

L

3

Cu 50 x 10 (Cu 80 x 10)

8

7

6

5

4

3

2

RBL-2

IP 20

L RBL-2

40 kA

protection degree

9

RBL-2

peak rated current

10

RBL-2

16 kA

RBL-2

1 second withstanded rated current

L

L1, L2, L3 400/230 V, 50 Hz

Stand-by

660 V

Stand-by

insulation rated voltage

PR measurement

1

RBL-2

230 / 400 V

RBL-2

rated voltage

RAL 7032 Cu 40 x 10 (Cu 60 x 10)

PEN

additional equipment RNTz

RNTz - 10

RNTz - 12

V A

600

20

A

V A

A

1000

A

1380

RNTz - 6

A

1200

280

RBL-2

rated continuous current


RNTz switchboards

continue.

Example:

Busbars

The RNTz switchboard busbars (10 feeder bays) 1 incomer:

2 feeder:

L1, L2, L3 - busbar Cu 60x10 (Cu 80 x 10)* - busbar Cu 40x10 (Cu 60 x 10)* PEN busbars as standard are fitted for busbar current transformers installation)

with SOCOMEC Sirco 1250 A (1600 A) insulating switch

L1

L2

L3

PEN

1

L1, L2, L3 - busbar Cu 50x10 (Cu 80 x 10)* - busbar Cu 40x10 (Cu 60 x 10)* PEN *( ) execution for - 1600 A przek³adniki pomiarów PK (PR)

SOCOMEC 1250 A

przek³adniki baterii kondensatorów L1

L2

2 L3

PEN

Connections with the transformer RNTz incomer options: 5

6

• 1250 A OETL insulating switch • 1250 A fuse insulating switch • 1250 A circuit breaker • without main circuit breaker

RNTz feeder options: • SLBM gr. 2 (3) insulating switch • XLBM gr. 2 (3) insulating switch

... connection using a traditional cable terminal

The RNTz switchboard with network-generator or automatic stand-by switching incomer supply, requires a customised design.

21


RNTz switchboards

continue.

PR, PK - measurements

PR and PK systems measurement boards

The RNT switchboards allow addition of the following measurement systems: PR – energy counter measurement PK – control measurement

The TT type measurement boards are adapted to install directly on the wall or in measurement cabinets. The TT-2 and TT-3 boards are fitted only with typical 3-phase counter boards. The TP-2 and TP-3 boards are fitted additionally with the terminal strip, voltage protection, control lamps etc.

TT-2 and TT-3 in OTT-2 (OTT-3) housing

TT-3

TT-2 WILK

WILK

WILK

WILK

WILK

WILK

650

500 450

650 550

TP-2

TP-2 and TP-3 in OTP-2 (OTP-3) housing

TP-3

WILK

WILK

WILK

750

WILK

WILK

850

700 zegar

zegar

zegar

zegar

Selection of current transformers for the measurement systems Transformer power 100 kVA 160 kVA 250 kVA 400 kVA 630 kVA

Internal load and additional equipment

All RNT switchboards are equipped with internal load system: service outlet, and station lighting circuit. The RNT switchboards allow installation of a transformer idle run capacitor.

Current transformer ratio 200 A / 5 A 300 A / 5 A 400 A / 5 A 600 A / 5 A 1000 A / 5 A

Transformer power 100 kVA 160 kVA 250 kVA 400 kVA 630 kVA

Capacitor power * 2 (2.5) kVAr 2.5 (3) kVAr 3 (5) kVAr 5 (7.5) kVAr 7.5 (10) kVAr

* - acc. to the transformer operation recommendations

22


Transformers

B

C

A

Oil type manufacturer

ABB

power

(kVA)

160

250

400

630

1000

A

(mm)

950

990

1085

1180

1890

B

(mm)

780

720

900

1020

1105

C

(mm)

1230

1340

1445

1570

2040

Transformer – medium voltage switchgear and low-voltage switchboard connection (see page 10)

The KS... type substation permit installation of dry type transformers: • cast wil technology transformers • RESIBLOC technology transformers

23


Medium-voltage and low-voltage cable connections Transformer – medium-voltage switchgear connections • single wire cables YHKXs with 20 kV insulation up to 250 kVA35 mm2 from 400 kVA to 630 kVA50 mm2 from 800 kVA to 1250 kVA70 mm2

Transformer – low-voltage RNTz switchboard connections • single wire cables YHKXs with 1 kV insulation: up to 250 kVA1 x 240 mm2 from 400 kVA to 630 kVA2 x 240 mm2 from 800 kVA to 1250 kVA4 x 185 (240) mm2

The medium-voltage switchgears in SF6 insulation permit connection of dry or oil cables.

Cable heads SF6 insulated switchgears head manufacturer line bays – incomer cables transformer bay – cables to the transformer

F&G

EUROMOLD

RAYCHEM

ASTS 20/630; AWKS 20/630

K400 TB; K400 LR

RICS

EASW 20/250

K 158 LR

RSES

air insulated switchgears head manufacturer

F&G

EUROMOLD

RAYCHEM

line bays – incomer cables

EAVI 20; TI 24

ITK; OTK

IXSU; OXSU

transformer bay – cables to the transformer

EAVI 20; TI 24

ITK; OTK

IXSU; OXSU

F&G

EUROMOLD

RAYCHEM

EAVI 20; TI 24

ITK; OTK

IXSU; OXSU

EASW 20/250; EASG 20/250

K 158 LR

RSES

transformers head manufacturer with traditional connectors (insulators) with jack connectors

24


Substation earthing

Safety earthing:

RNTz switchboard service earthing:

• the substation equipment and structures and connected to the earthing busbar with a green and yellow insulated cable – 1 x 50 mm2. • the earthing busbar is connected through a test clamp 1 with external substation earthing (flat section 200 mm2). • the building reinforcement is used as additional, common metallic connection for all substation structure components.

• the PEN terminal of the RNTz switchboard is connected through the test clamp 3 with external substation earthing. Transformer service earthing:

FeZn 50x4 mm

• the transformer neutral point is connected through the test clamp 2 with external substation earthing. • the connection of the test terminal with the transformer neutral point is made with the 1 x 50 mm2 cable (1 x 120 mm2 or 25 x 4 mm2 tinned flat section – according to Electric Power Distribution Company) – with blue insulation. • to facilitate creation of substation earthing, flat-section FeZn 50 x 4 segments are included to connect the earthing points number 1, 2, and 3 with the circumferential earthing.

KS 19-28 z KS 22-30 z KS 25-36 z Earthing busbar

FeZn 50x4 mm

PEN PE

FeZn 50x4 mm

2

FeZn 50x4 mm

1

LV switchboard

N

3

Transformer neutral point

Substation structure

Division

Transformer

MV cable

MV switchgear

PE

25


Substation installation and placement KS 19-28 z Substation placement (with equipment) 2800

16 T crane

1900

1700

traverse

9,5 T

breakstone

650

ground level

• the installation traverse is supplied with the substation • the lifting sling for roof removal is supplied with the substation

2300

150

cable

2300 3500

4400 cable do not oversize the foundation slab – cable runs

Substation placement (with equipment)

KS 22-30 z

16 T crane (25 T in case of difficulties)

3000

2200

1850

traverse

12,5 T

• the lifting sling for roof removal is supplied with the substation

3300

150

• the installation traverse is supplied with the substation

700

ground level breakstone

4600

2500 3800

KS 25-36 z

Substation placement (with equipment) 16 T crane (25 T in case of difficulties)

3600

2500

1850

trawers

15 T

• the lifting sling for roof removal is supplied with the substation

26

150

• the installation traverse is supplied with the substation

700

ground level breakstone

3900

2800

5300

4200


Transformer substation KS 19-28 z KS 22-30 z KS 25-36 z Substation equipment options - standard

substation building MV switchgear:

option: SF6 - insulation – SafeRing or SafePlus • up to 4 bays (24 kV)

LV switchboard transformer

RNTz - 6, 10, 12 bay max. 630 kVA

Equipment placement

7

1

reinforced concrete building

2

medium-voltage switchgear, max. 4 bays, with SF6 insulation

3

MV/LV transformer

4

low-voltage RNTz switchboard, 6, 10, 12-bay

5

additional equipment space

6

substation service door

7

ventilation door

8

exhaust grate

6

1 6

5 2 4

8 3 7

Examples of low-voltage side of the 19-28 z substation RNTz – 10 bay switchboard in standard version

5

RNTz – 10 bay switchboard with PK and PR measurement

4

5

RNTz – 10 bay switchboard with PK and PR measurement, and external lighting module

4

5

V A kVAr

4 V

A

A

A

kWh

RNTz – 10 + RNTz – 6 with PK measurement, and transformer idle run compensation

4 V

A

A

A

A

A

kVAr

ST

kWh

Low voltage compartment

Low voltage compartment

Low voltage compartment

Low voltage compartment

fig.

8.1 27


Medium-voltage switchgear (p. 19)

KS... z substation electrical diagram

SafeRing or SafePlus with circuit breaker in the transformer bay

with fuse...

kV

L1, L2, L3 in SF6 insulation

MV/LV transformer (p. 23)

I>

3x1YHKXS 50 cable EASW 20/250 heads

Earthing busbar

MV/LV oil sealed transformer

kV

Transformer

MV switchgear

LV switchboard

Structures

Other

1

Compensation

2

A kVAr

Internal load 16 A D01

16 A D01

SIRCO 6A D01

Energy counter Qsn

PR :

Qnn

60W

60W

PV

V 3

A/5A

220 V/16 A

A

6A D01

Test energy counter

L

RNTz L1, L2, L3 400/230 V, 50 Hz

L

L

3

PK :

Cu 50 (80) x 10

A/5A

Cu 40 (60) x 10

PEN

1

RBL-2

2

RBL-2

3

RBL-2

4

RBL-2

5

RBL-2

6

RBL-2

7

RBL-2

8

RBL-2

9

Stand-by

10

Stand-by

RozdzLow-voltage switchboard RNTz – (pp. 20-22)

4x2YKXS 240 cables

PEN

3

The transformer, type and number of medium-voltage and low-voltage switchgear bays, and additional substation equipment are determined by the client fig

28

8.2


Transformer substation KS 19-28 z KS 22-30 z KS 25-36 z Substation equipment options – with medium-voltage side measurement substation building: MV switchgear:

option: SF6 insulation – SafeRing • 2 bays (24 kV) – with circuit breaker or fuse • MV measurement bay

LV switchboard transformer

RNTz - 6, 10, 12 bay max. 630 kVA

Equipment placement in the KS 19-29 z substation

1

reinforced concrete building

2

medium-voltage switchgear, with SF6 insulation

2a

medium-voltage measurement bay

3

MV/LV transformer

4

low-voltage RNTz switchboard

5

additional equipment space

6

substation service door

7

ventilation door

8

exhaust grate

7 6

1 6

5

2a

4

8 2 3 7

The KS 25-36 z building allows installation of 3-bya medium-voltage SafeRing switchgear and medium-voltage measurement module

fig.

9.1 29


Medium-voltage switchgear (p. 19)

KS... w substation electrical diagram – example with measurement cell

2-bay switchgear with fuse (SafeRing) in the transformer bay + medium-voltage measurement bay

L1, L2, L3 in SF6 insulation

17.5 (24) kV

3

IMZ

UMZ 3

MV/LV transformer (p. 23)

EAVI 20 heads

TP board

3xYHKXS 50 cable

3x1YHKXS 50 cable EASW 20/250 heads

Earthing busbar

MV/LV oil sealed transformer

kVA

1 Transformer

MV switchgear

LV switchboard

Other

Low-voltage switchboard RNTz – (pp. 20-22)

Structures

kV 2

Compensation 4x2YKXS 240 cable

kVAr RB-00

Internal load 16 A D01

16 A D01

SIRCO

Qsn

Qnn

60W

60W

6A D01

PV

V

220 V/16 A 3

PEN

L1,L2,L3

1

RBL-2

2

RBL-2

3

RBL-2

4

RBL-2

5

RBL-2

6

RBL-2

7

RBL-2

8

Stand-by

9

Stand-by

10

Cu 50 (80) x 10

Cu 40 (60) x 10

RBL-2

RNTz

A Test energy counter

PK : A/5A

PEN

3

The transformer, type and number of medium-voltage and low-voltage switchgear bays, and additional substation equipment are determined by the client standard

additional equipment fig.

30

9.2


Two-transformer substation 2KS 19-28 z 2KS 22-30 z 2KS 25-36 z Substation equipment options – example of two-transformer substation

substation building

2x

MV switchgear:

e.g.

2 x SafeRing or SafePlus

LV switchboard

e.g.

2 x RNTz - 6, 10, 12 bay

transformer

e.g.

2 x 630 kVA

Equipment placement in the 2 KS 19-29 z substation

7 1

reinforced concrete building

2

medium-voltage switchgear, max. 4-bay, with SF6 insulation

3

MV/LV transformer

4

low-voltage RNTz 6, 10, 12-bay switchboard

5

additional equipment panel

6

substation service door

7

ventilation door

8

ventilation grate

9

exhaust grate

6

1 6

5 2 4

9 3 8

8 6

1 6

5 2 4

9 3 7

fig.

10.1

31


KS... z substation electrical diagram – example

SafeRing or SafePlus with circuit breaker in the transformer bay

Medium-voltage switchgear (p. 19)

L1, L2, L3 in SF6 insulation

kV

L1, L2, L3 in SF6 insulation

I>

I>

Earthing busbar 3x1YHKXS 50 cable

3x1YHKXS 50 cable

EASW 20/250 heads

EASW 20/250 heads

T2

1

2

2

4x2YKXS 240 cable

4x2YKXS 240 cable

A

Transformer

kV

kVA

MV switchgear

kVA Other

kV

Transformer

MV switchgear

LV switchboard

Structures

Other

MV/LV oil sealed transformer

LV switchboard

T1

1

Structures

MV/LV transformer (p. 23)

Earthing busbar

Compensation

A

kVAr

kVAr SIRCO

SIRCO

Internal load

MP: A/5A

A 6A D01

PR:

Cu 40 (60) x 10

3

PEN

A/5A

5

6

RNTz L1, L2, L3 400/230 V, 50 Hz

7

8

RBL-2

4

RBL-2

3

9

10

RBL-2

L

RBL-2

PEN

PEN

PEN

2

L1,L2,L3

1

L1,L2,L3

1

2RBL-3

2

RBL-2

3

RBL-2

4

RBL-2

RBL-2

RBL-2

5

L

Cu 50 (80) x 10

Cu 50 (80) x 10 6

L

3

RBL-2

3

RBL-2

L

RBL-2

L

RBL-2

L

A/5A 7

RBL-2

RBL-2

A

3

PR:

RNTz L1, L2, L3 400/230 V, 50 Hz 8

PV

V 3

6A D01

Energy counter

9

6A D01

V

MP: A/5A

10

6A D01

PV

Test energy counter

RBL-2

RozdzielnicLow-voltage switchboard RNTz – (pp. 20-22)

SafeRing or SafePlus with circuit breaker in the transformer bay

kV

Cu 40 (60) x 10

3

...the medium-voltage and low-voltage switchgear and switchboard can be equipped with mechanical locks The transformer, type and number of medium-voltage and low-voltage switchgear bays, and additional substation equipment are determined by the client fig.

32

10.2


Exterior 1

MV/LV transformer

Identification label

MV Switchgear

Exterior 2

ROOF grey or brown colour WALLS sand colourr METAL FITTINGS grey or brown colour

Exterior 2

TRIM grey or brown colour

ROOF grey or brown colour WALLS sand colourr METAL FITTINGS grey or brown colour TRIM grey or brown colour

Exterior 4

MV Switchgear

MV/LV transformer

Exterior

fig. 01

33


4-bay SafeRing medium-voltage switchgear

Service door

MV/LV transformer, max 630 kVA , dimensions max. 1600 x 1030 mm

Ventilation door

KS 19-28 z substation

Low-voltage switchboard RNTz-10

fig. 02

Temporary cable inlet

Equipment placement

34


KS 19-28 z substation

980

Exhaust grate

Leak-proof oil pit

300 995

Equipment placement

UK 40/60 cable holders

1415

fig. 03

35


Version 1

Version 2

W1 vibration damper (with level adjustment)

NOTES: 1.Transformer installation is performed after substation roof removal. 2.The transformer is placed directly in the oil pit: - on vibration dampers (version 1), or - on shock absorbing cushions (version 2)

W2 shock absorbing cushion

Version3

Transformer mounting strips

Transformer installation

Fig. 04

36


Version 1 P50 cable bushing (Æ 50 mm)

Version 2 P70 cable bushing (Æ7

Thermo-shrink tube

XPLE insulated cable

0 mm)

Thermo-shrink tube

Version 3 HD125 (150)

XPLE insulated or paper-oil insulated cable

Cable bushings

Thermo-shrink tube

fig. 05

XPLE insulated or paper-oil insulated cable

37


Service door

Technical specifications: 1.Material – aluminium or aluzinc sheet 2.Anti-rust coating – polyester powder paint 3.Ingress protection – IP43

Casement-bolt lock with turn/tilt handle

Ventilation door

KS...z substations joinery

fig. 06

38

Insect screen


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